.w_mt 
  margin-top 0

.w_c_bf
  &:first-child
    &:before
      display block

.w_btn_f
  text-align center
  text-overflow ellipsis
  overflow hidden
  white-space nowrap
  cursor pointer
  -webkit-user-select none
  left .4em
  margin-top 1px
  z-index 10
  border-color #ddd
  color #333
  position absolute
  top .24em
  padding-left 1.5em
  padding .7em 1em
  display inline-block

.w_mg_t15
  margin-top 15px
  
.w_pad_l_r_15
  padding 0 15px
  
.weui_mask_transition
  display block
  
.button_sp_area
  width 60%
  text-align center
  margin 0 auto
  
.inline_block
  display inline-block